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kata-check_arm64_test.go
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kata-check_arm64_test.go
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// Copyright (c) 2018 ARM Limited
//
// SPDX-License-Identifier: Apache-2.0
//
package main
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"path"
"path/filepath"
"testing"
"github.com/stretchr/testify/assert"
"github.com/urfave/cli"
)
func setupCheckHostIsVMContainerCapable(assert *assert.Assertions, cpuInfoFile string, moduleData []testModuleData) {
//For now, Arm64 only deal with module check
createModules(assert, cpuInfoFile, moduleData)
err := makeCPUInfoFile(cpuInfoFile, "", "")
assert.NoError(err)
}
func TestCCCheckCLIFunction(t *testing.T) {
assert := assert.New(t)
dir, err := ioutil.TempDir("", "")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(dir)
savedSysModuleDir := sysModuleDir
savedProcCPUInfo := procCPUInfo
cpuInfoFile := filepath.Join(dir, "cpuinfo")
// XXX: override
sysModuleDir = filepath.Join(dir, "sys/module")
procCPUInfo = cpuInfoFile
defer func() {
sysModuleDir = savedSysModuleDir
procCPUInfo = savedProcCPUInfo
}()
err = os.MkdirAll(sysModuleDir, testDirMode)
if err != nil {
t.Fatal(err)
}
moduleData := []testModuleData{
{filepath.Join(sysModuleDir, "kvm"), true, ""},
{filepath.Join(sysModuleDir, "vhost"), true, ""},
{filepath.Join(sysModuleDir, "vhost_net"), true, ""},
}
devNull, err := os.OpenFile(os.DevNull, os.O_WRONLY, 0666)
assert.NoError(err)
defer devNull.Close()
savedLogOutput := kataLog.Logger.Out
// discard normal output
kataLog.Logger.Out = devNull
defer func() {
kataLog.Logger.Out = savedLogOutput
}()
setupCheckHostIsVMContainerCapable(assert, cpuInfoFile, moduleData)
ctx := createCLIContext(nil)
ctx.App.Name = "foo"
// create buffer to save logger output
buf := &bytes.Buffer{}
// capture output this time
kataLog.Logger.Out = buf
fn, ok := kataCheckCLICommand.Action.(func(context *cli.Context) error)
assert.True(ok)
err = fn(ctx)
assert.NoError(err)
output := buf.String()
for _, m := range moduleData {
name := path.Base(m.path)
assert.True(findAnchoredString(output, name))
}
}
func TestKvmIsUsable(t *testing.T) {
assert := assert.New(t)
dir, err := ioutil.TempDir("", "")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(dir)
savedKvmDevice := kvmDevice
fakeKVMDevice := filepath.Join(dir, "kvm")
kvmDevice = fakeKVMDevice
defer func() {
kvmDevice = savedKvmDevice
}()
err = kvmIsUsable()
assert.Error(err)
err = createEmptyFile(fakeKVMDevice)
assert.NoError(err)
err = kvmIsUsable()
assert.Error(err)
}
func TestGetCPUDetails(t *testing.T) {
type testData struct {
contents string
expectedVendor string
expectedModel string
expectedNormalizeVendor string
expectedNormalizeModel string
expectError bool
}
const validVendorName = "0x41"
const validNormalizeVendorName = "ARM Limited"
validVendor := fmt.Sprintf(`%s : %s`, archCPUVendorField, validVendorName)
const validModelName = "8"
const validNormalizeModelName = "v8"
validModel := fmt.Sprintf(`%s : %s`, archCPUModelField, validModelName)
validContents := fmt.Sprintf(`
a : b
%s
foo : bar
%s
`, validVendor, validModel)
data := []testData{
{"", "", "", "", "", true},
{"invalid", "", "", "", "", true},
{archCPUVendorField, "", "", "", "", true},
{validVendor, "", "", "", "", true},
{validModel, "", "", "", "", true},
{validContents, validVendorName, validModelName, validNormalizeVendorName, validNormalizeModelName, false},
}
tmpdir, err := ioutil.TempDir("", "")
if err != nil {
panic(err)
}
defer os.RemoveAll(tmpdir)
savedProcCPUInfo := procCPUInfo
testProcCPUInfo := filepath.Join(tmpdir, "cpuinfo")
// override
procCPUInfo = testProcCPUInfo
defer func() {
procCPUInfo = savedProcCPUInfo
}()
_, _, err = getCPUDetails()
// ENOENT
assert.Error(t, err)
assert.True(t, os.IsNotExist(err))
for _, d := range data {
err := createFile(procCPUInfo, d.contents)
assert.NoError(t, err)
vendor, model, err := getCPUDetails()
if d.expectError {
assert.Error(t, err, fmt.Sprintf("%+v", d))
continue
} else {
assert.NoError(t, err, fmt.Sprintf("%+v", d))
assert.Equal(t, d.expectedNormalizeVendor, vendor)
assert.Equal(t, d.expectedNormalizeModel, model)
}
}
}